RTwP is certainly more immersive and sophisticated than TB. That's not even something that can be argued against. RTwP contains tall he mechanics of TB, with added layers on top - and that makes it literally more sophisticated. Some RTwP games can even be played in TB mode. Since RTwP is TB + more, it's definitively more sophisticated, complex, and offers more possibilities.
I have nothing against RTwP and played several thousand hours of RTwP games in the last 5 years - but that statement is just blatantly wrong.
As for example Deadfire shows (where we have RTwP and TB mode in one game) they are two different beasts and it's rel. easy to see what sets them apart.
It's rather obvious that TB is not a subset of RTwP. Also RTwP doesn't offer more possibilities per se.
Declaring opinion as "facts" and telling people what they can argue against or not is not the best discussion style by the way...
